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通过分析几个有代表性的单烯／二烯自由基交联模型的计算机模拟结果，认为凝胶点判据和凝胶形成机理是两个相互联系但决不相同的概念．将体系中首次出现分子平均交联密度等于的分子作为凝胶点判据．凝胶形成过程可分为成核与生长两个阶段，成核条件为溶胶分子平均交联密度等于
By analyzing the computer simulation results of several representative mono-olefin / diene free-radical crosslinking models, it is considered that the gel point criterion and the gel-forming mechanism are two interrelated but never different concepts. The first time in the system, the molecule with the average molecular cross-linking density equals to the gel point criterion. Gel formation process can be divided into two stages of nucleation and growth, nucleation conditions for the sol average molecular cross-linking density is equal to